It seems you're referring to the starring Jason Lee, Julia Stiles, and Selma Blair. While it was a feature film rather than an episodic TV series, the "opening act" sets up its farcical premise. Movie Review: A Guy Thing
In this early-2000s rom-com, plays Paul, a "good guy" who wakes up next to a tiki dancer named Becky ( Julia Stiles ) the morning after his bachelor party. Panicked, he tries to hide the incident from his fiancée, Karen ( Selma Blair ), only to discover that Becky is actually Karen’s cousin. The Good A Guy Thing Episode 1
The chemistry between Lee and Stiles is often cited as the movie's strongest asset. Reviewers from Reel Film Reviews found Lee's performance predictably charming. It seems you're referring to the starring Jason
Strong character actors like James Brolin and Thomas Lennon provide some of the film's funniest moments. Panicked, he tries to hide the incident from
For those looking for "easy-going entertainment," some audience reviews on Rotten Tomatoes found it a cute, uncomplicated watch. The Bad A Guy Thing (2003)